Gauge invariance, background fields and modified Ward identities
High Energy Physics - Theory
2009-11-07 v2 High Energy Physics - Phenomenology
Abstract
In this talk the gauge symmetry for Wilsonian flows in pure Yang-Mills theories is discussed. The background field formalism is used for the construction of a gauge invariant effective action. The symmetries of the effective action under gauge transformations for both the gauge field and the auxiliary background field are separately evaluated. Modified Ward-Takahashi and background field identities are used in my study. Finally it is shown how the symmetry properties of the full theory are restored in the limit where the cut-off is removed.
Cite
@article{arxiv.hep-th/0101108,
title = {Gauge invariance, background fields and modified Ward identities},
author = {F. Freire and D. F. Litim and J. M. Pawlowski},
journal= {arXiv preprint arXiv:hep-th/0101108},
year = {2009}
}
Comments
6 pages, to appear in the Proceedings of the 2nd Conference on the Exact Renormalization Group, Rome 2000